Double slit diffraction of three interfering beams

Jiafa Sun

Interference and diffraction of light are the nature performance of wave character,which is the result of superposition of waves.The essential difference between interference and diffraction phenomena is that interference comes from the superposition by the two or limited interfering beams of light,and diffraction is from the superposition by an infinite beam.From the perspective of optical path difference,corresponding to the same optical path difference,the minimum conditions of single-slit diffraction becomes the maxima conditions of double-slit interference.The reason is that the slot width is so small that can be considered as a single light source under the double-slit case,and the interference in the same slit can be ignored;while the single-slit diffraction minimum conditions are exactly correspond to the interference in the same slit.

Stefano Frabboni, C. Frigeri, G. C. Gazzadi +1 more

Natalie G. Ferris

Li U

We studied electron single-slit,double-slit and three-slit diffraction with a new quantum mechanics approach and obtained the following results.(1) For single-slit diffraction,the thickness of the single-slit can make a large impact on the diffraction intensity and pattern.(2) For double-slit diffraction,when the ratio of(a+d)/a=n(n=1,2,3,…),orders n,2n,3n,… are missing in diffraction pattern,when the ratio of(a+d)/a≠n(n=1,2,3,…),there isn't missing order in diffraction pattern.(3) For double-slit diffraction,it can be found that when the thickness of the double-slit increases,the diffraction intensity and pattern will be changed,and when the thickness of the double-slit increases,the missing order phenomena disappear.(4) For three-slit diffraction,when the thickness of the slit increases,the diffraction intensity and pattern will be changed,and there is one secondary maxima and two minima between the two principle maxima.

Fotini Pallikari

It was recently proposed that the fringe visibility in the interference pattern of a double-slit diffraction experiment with a HeNe laser beam was reduced as a consequence of the focused attention of participants on the double-slit that initiated the collapse of the photon wavefunction. A thorough examination of the reported apparatus and diffraction pattern data is presented here revealing a number of inconsistencies in the experimental setup. The hypothesis for wavefunction collapse under the proposed experimental conditions is found problematic as the use of single photon sources is demanded.

Yoshiki Ohoka, S. Fukatsu